TreeGridLoaded ({ /* JSONP header, to be possible to load from xxx_Jsonp data source */ 
   "Body" : [ 
      [ 
         { "id": "1", "Items": [
            { "id": "1", "REMARK": "Remark 1"   }, 
            { "id": "2", "REMARK": "Remark 2"   }  
         ]}, 
      ], 
   ], 
}) /* End of JSONP header */ 